/*
 * CallGuru Corporate Website Styles
 * Aesthetic: Precision Enterprise - Editorial sophistication meets technical confidence
 */

/* ========================================
   CSS Variables & Design Tokens
   ======================================== */
:root {
  /* Brand Colors - Blues & Teals */
  --cg-cyan-50: #ecfeff;
  --cg-cyan-100: #cffafe;
  --cg-cyan-500: #06b6d4;
  --cg-cyan-600: #0891b2;
  --cg-cyan-700: #0e7490;
  --cg-blue-500: #3b82f6;
  --cg-blue-600: #2563eb;
  --cg-blue-700: #1d4ed8;

  /* Neutrals */
  --cg-navy-900: #0f172a;
  --cg-navy-800: #1e293b;
  --cg-slate-700: #334155;
  --cg-slate-600: #475569;
  --cg-slate-400: #94a3b8;
  --cg-slate-200: #e2e8f0;
  --cg-slate-100: #f1f5f9;
  --cg-white: #ffffff;

  /* Typography */
  --font-display: 'DM Sans', system-ui, -apple-system, sans-serif;
  --font-body: 'Inter', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', 'Courier New', monospace;

  /* Spacing */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2rem;
  --space-xl: 3rem;
  --space-2xl: 4rem;
  --space-3xl: 6rem;
  --space-4xl: 8rem;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);

  /* Transitions */
  --transition-fast: 150ms ease-in-out;
  --transition-base: 250ms ease-in-out;
  --transition-slow: 400ms ease-in-out;
}

/* ========================================
   Global Reset & Base Styles
   ======================================== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--cg-slate-700);
  background: var(--cg-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ========================================
   Typography
   ======================================== */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.2;
  color: var(--cg-navy-900);
  margin-bottom: var(--space-md);
}

h1 {
  font-size: clamp(2.5rem, 5vw, 4.5rem);
  letter-spacing: -0.02em;
}

h2 {
  font-size: clamp(2rem, 4vw, 3.5rem);
  letter-spacing: -0.01em;
}

h3 {
  font-size: clamp(1.5rem, 3vw, 2.25rem);
}

h4 {
  font-size: clamp(1.25rem, 2.5vw, 1.75rem);
}

p {
  margin-bottom: var(--space-md);
  max-width: 70ch;
}

.lead {
  font-size: 1.25rem;
  line-height: 1.8;
  color: var(--cg-slate-600);
}

.mono {
  font-family: var(--font-mono);
  font-size: 0.9em;
}

/* ========================================
   Navigation
   ======================================== */
.corporate-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--cg-slate-200);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.corporate-nav.scrolled {
  box-shadow: var(--shadow-md);
}

.nav-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: var(--space-md) var(--space-lg);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-logo {
  display: flex;
  align-items: center;
  text-decoration: none;
}

.nav-logo img {
  height: 40px;
  width: auto;
}

.nav-links {
  display: flex;
  gap: var(--space-xl);
  list-style: none;
}

.nav-links a {
  text-decoration: none;
  color: var(--cg-slate-700);
  font-weight: 500;
  font-size: 0.95rem;
  position: relative;
  transition: color var(--transition-fast);
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--cg-cyan-600);
  transition: width var(--transition-base);
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--cg-cyan-600);
}

.nav-links a:hover::after,
.nav-links a.active::after {
  width: 100%;
}

.nav-cta {
  background: var(--cg-cyan-600);
  color: var(--cg-white);
  padding: 0.75rem 1.5rem;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 600;
  transition: all var(--transition-base);
  box-shadow: 0 4px 12px rgba(8, 145, 178, 0.2);
}

.nav-cta:hover {
  background: var(--cg-cyan-700);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(8, 145, 178, 0.3);
}

.mobile-menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--cg-navy-900);
  cursor: pointer;
}

/* ========================================
   Hero Section
   ======================================== */
.hero {
  min-height: 90vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding-top: 80px;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg,
    var(--cg-cyan-50) 0%,
    var(--cg-white) 50%,
    var(--cg-blue-500) 100%);
  opacity: 0.05;
  z-index: 0;
}

.hero-pattern {
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle at 1px 1px, var(--cg-cyan-600) 1px, transparent 0);
  background-size: 40px 40px;
  opacity: 0.03;
  z-index: 1;
}

.hero-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: var(--space-3xl) var(--space-lg);
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
  align-items: center;
}

.hero-content h1 {
  margin-bottom: var(--space-lg);
  animation: fadeInUp 0.8s ease-out;
}

.hero-content .lead {
  margin-bottom: var(--space-xl);
  animation: fadeInUp 0.8s ease-out 0.2s backwards;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
  margin-top: var(--space-2xl);
  animation: fadeInUp 0.8s ease-out 0.4s backwards;
}

.stat-item {
  text-align: left;
}

.stat-number {
  font-family: var(--font-mono);
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--cg-cyan-600);
  display: block;
  line-height: 1;
  margin-bottom: var(--space-xs);
}

.stat-label {
  font-size: 0.875rem;
  color: var(--cg-slate-600);
  font-weight: 500;
}

.hero-visual {
  position: relative;
  animation: fadeIn 1s ease-out 0.6s backwards;
}

.hero-image {
  width: 100%;
  border-radius: 16px;
  box-shadow: var(--shadow-xl);
  transform: rotate(2deg);
  transition: transform var(--transition-slow);
}

.hero-image:hover {
  transform: rotate(0deg) scale(1.02);
}

/* ========================================
   Section Layouts
   ======================================== */
.section {
  padding: var(--space-4xl) var(--space-lg);
  position: relative;
}

.section-container {
  max-width: 1400px;
  margin: 0 auto;
}

.section-header {
  text-align: center;
  margin-bottom: var(--space-3xl);
}

.section-subtitle {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--cg-cyan-600);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-sm);
}

.section-alt {
  background: var(--cg-slate-100);
}

/* ========================================
   Cards & Grid
   ======================================== */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--space-xl);
}

.card {
  background: var(--cg-white);
  border-radius: 12px;
  padding: var(--space-xl);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-base);
  border: 1px solid var(--cg-slate-200);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
  border-color: var(--cg-cyan-600);
}

.card-icon {
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, var(--cg-cyan-600), var(--cg-blue-600));
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-md);
  font-size: 1.5rem;
}

.card h3 {
  margin-bottom: var(--space-sm);
  font-size: 1.5rem;
}

.card p {
  color: var(--cg-slate-600);
  margin-bottom: 0;
}

/* ========================================
   Buttons & CTAs
   ======================================== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: 1rem 2rem;
  border-radius: 8px;
  font-weight: 600;
  text-decoration: none;
  transition: all var(--transition-base);
  cursor: pointer;
  border: none;
  font-family: var(--font-body);
  font-size: 1rem;
}

.btn-primary {
  background: var(--cg-cyan-600);
  color: var(--cg-white);
  box-shadow: 0 4px 12px rgba(8, 145, 178, 0.2);
}

.btn-primary:hover {
  background: var(--cg-cyan-700);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(8, 145, 178, 0.3);
}

.btn-secondary {
  background: transparent;
  color: var(--cg-cyan-600);
  border: 2px solid var(--cg-cyan-600);
}

.btn-secondary:hover {
  background: var(--cg-cyan-600);
  color: var(--cg-white);
}

.btn-group {
  display: flex;
  gap: var(--space-md);
  flex-wrap: wrap;
}

/* ========================================
   Footer
   ======================================== */
.corporate-footer {
  background: var(--cg-navy-900);
  color: var(--cg-slate-400);
  padding: var(--space-3xl) var(--space-lg) var(--space-xl);
}

.footer-container {
  max-width: 1400px;
  margin: 0 auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-3xl);
  margin-bottom: var(--space-2xl);
}

.footer-brand img {
  height: 40px;
  margin-bottom: var(--space-md);
  filter: brightness(0) invert(1);
}

.footer-brand p {
  color: var(--cg-slate-400);
  max-width: 35ch;
}

.footer-column h4 {
  color: var(--cg-white);
  font-size: 1rem;
  margin-bottom: var(--space-md);
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: var(--space-sm);
}

.footer-links a {
  color: var(--cg-slate-400);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: var(--cg-cyan-500);
}

.footer-bottom {
  padding-top: var(--space-xl);
  border-top: 1px solid var(--cg-slate-700);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.social-links {
  display: flex;
  gap: var(--space-md);
}

.social-links a {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--cg-slate-700);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--cg-white);
  text-decoration: none;
  transition: all var(--transition-base);
}

.social-links a:hover {
  background: var(--cg-cyan-600);
  transform: translateY(-2px);
}

/* ========================================
   Animations
   ======================================== */
@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-50px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(50px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

.fade-in {
  animation: fadeIn 0.6s ease-out;
}

.fade-in-up {
  animation: fadeInUp 0.8s ease-out;
}

/* Scroll reveal animation */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.8s ease-out;
}

.reveal.active {
  opacity: 1;
  transform: translateY(0);
}

/* ========================================
   Responsive Design
   ======================================== */
@media (max-width: 1024px) {
  .hero-container {
    grid-template-columns: 1fr;
    gap: var(--space-2xl);
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
  }

  .mobile-menu-toggle {
    display: block;
  }

  .nav-links.mobile-open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--cg-white);
    padding: var(--space-lg);
    box-shadow: var(--shadow-lg);
    gap: var(--space-md);
  }

  .hero-stats {
    grid-template-columns: 1fr;
  }

  .card-grid {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
  }

  .footer-bottom {
    flex-direction: column;
    gap: var(--space-md);
    text-align: center;
  }
}

/* ========================================
   Utility Classes
   ======================================== */
.text-center {
  text-align: center;
}

.text-cyan {
  color: var(--cg-cyan-600);
}

.bg-gradient {
  background: linear-gradient(135deg, var(--cg-cyan-600), var(--cg-blue-600));
}

.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.mt-xl {
  margin-top: var(--space-xl);
}

.mb-xl {
  margin-bottom: var(--space-xl);
}